GCCS students have consistently been among the top performers in the Rochester area according to state tests. The school is also one of the top five in Monroe County in the New York School Quality Index, which measures non-academic factors.

The school stands out from others in the city, charter or district, for its low proportion of poor students (31 percent economically disadvantaged), students of color (36 percent non-white).

Its charter renewal was threatened in 2015 after the state questioned why its demographics didn't more closely match those of the city; Wing responded that the school has always attempted to reflect the racial and economic pattern of the county, not the city.